Endress+Hauser Liquiline CM444 - Power Supply CM442

Electrical connection Liquiline CM442/CM444/CM448
26 Endress+Hauser
connection via M12 plug-in connection
Only for connection in non-hazardous area.
85 86
85
1
2
86
97 88 8798
Sensor 1
PK
GY
GN
YE
BN
WH
1
A0018019
 28 M12 plug-in connection
(e.g. at sensor module)
1 Sensor cable with M12
connector
6
4
1
NC
2
3
5
7
4
6
2
NC
1
7
5
3
A0018021
 29 M12 assignment Top:
socket Bottom: connector
(top view in each case)
1 PK (24 V)
2 GY (Ground 24 V)
3 BN (3 V)
4 WH (Ground 3 V)
5 GN (Memosens)
6 YE (Memosens)
7,
NC
Not connected
Device versions with a pre-installed
M12 socket are ready-wired upon
delivery.
Version without a pre-installed
M12 socket
1. Insert an M12 socket
(accessory) into a suitable
opening in the base of the
housing.
2. Connect the cable to a
Memosens terminal as per
the wiring diagram.
Connecting the sensor
‣
Plug the connector of the sensor
cable (→  28item 1) directly
into the M12 socket.
Please note the following:
• The internal device wiring is
always the same regardless of
what kind of sensor you connect
to the M12 socket (plug&play).
• The signal or power supply cables
are assigned in the sensor head in
such a way that the PK and GY
power supply cables are either
used (e.g. optical sensors) or not
(e.g. pH or ORP sensors).
If intrinsically safe sensors are connected to the transmitter with sensor communication
module type 2DS Ex-i, the M12 plug-in connection is not permitted.
5.2.4 Connecting sensors for hazardous area
Sensor cable connected directly
‣
Connect the sensor cable to the terminal connector of the sensor communication module
2DS Ex-i.